Introduction
This invention features a gauze and a gaupage retraction mechanism consisting of a main tube, a spring box, a shaft support, an inner shaft, and an end seat. It functions like a regular screen window and allows for adjustable opening of both the glass window and the screen. When the glass window is opened, the gauze expands along with it to cover the opening. When the window is closed, the gauze is wound back onto the inner shaft and stored inside the main tube by the spring force of the retraction system. This design ensures that the gauze doesn't take up space or interfere with the window’s function. The product offers an elegant look, can be hidden or visible depending on the window's operation, and is easy to install and remove, making it an ideal choice for sliding windows.
Invisible screens are not truly invisible. Their design relies on materials with extremely fine wire diameters (thousandths of a millimeter) and high light transmittance (up to 96%). The effect is similar to "no screen at all." To achieve this, the material must have high tensile strength, transparency, corrosion resistance, weather resistance, stability, and a low refractive index. Transparent monofilaments are used, and the weaving density is high enough to create a diffraction effect, resulting in a "soft white" appearance. Additionally, chemical coatings enhance light transmission.
Common window screens are typically made from glass fiber yarn, polyester yarn, or Taiwan SPL yarn. Both glass fiber and polyester are plain weave, and we currently use flat-woven glass fiber. These are available in black, gray, and off-white. Black is more common in the north, while gray is more popular in the south. However, black yarn is stronger due to the addition of carbon black during production, which acts as a stabilizer and improves adhesion between PVC and fiberglass. Polyester yarn is strong but not fire-resistant and has been banned in some cities like Beijing. Taiwan SPL yarn is twisted and the strongest among these, but it is expensive and still not fireproof. While it's sometimes used in home decoration, it is not suitable for engineering projects.
Nailless Installation
There are two main installation methods for invisible screens: flat type and push-pull type. The flat type is fixed using straight buckles and cannot move, while the push-pull type is mounted directly on the slide rail and moves with it. The type of window determines the installation method. Nail-free invisible screens use high-strength double-sided tape and glass glue for installation, which avoids damaging the window and provides a firm hold. This method is increasingly popular due to its ease of installation, but it is not recommended for high-rise buildings because of the risk of falling and potential injury or damage.
Professional Knowledge
1. When purchasing invisible screens, first examine the profiles. The market mainly uses aluminum alloy and plastic steel. Plastic profiles are commonly used in engineering and last about one year. Aluminum alloy profiles are used in both engineering and home improvement. Engineering-grade screens last about four years, while home-use ones can last six years. Note that this refers to partial wear, not total failure.
Suggestion: Pay attention to the strength of the aluminum alloy when selecting the screen door or window. Thickness and hardness vary significantly, so choose carefully.
2. Bearing types differ. Bearings are either domestic or imported.
Suggestion: In areas with lots of wind and sand, such as Beijing, domestic open bearings may get clogged with dust and lose smoothness. It's better to choose imported fully enclosed silent bearings.
3. Spring selection matters. There are different springs for windows and doors.
Suggestion: After installing the screen, test the rewinding function. If it's too slow, it might be a window spring rather than a door spring.
4. Gauze types vary. Gauze comes in glass fiber mesh and polyester-coated chemical fiber mesh.
Suggestion: Glass fiber mesh is the most common in the market. It is flame-retardant, resistant to aging, and eco-friendly. The best quality comes from Tianjin, known for higher prices and better performance. Look for even holes, uniform color, and a flat surface. Glass fiber gauze typically lasts over eight years, though frequent dust accumulation may shorten its life. Polyester-coated mesh is used in folding screens, is lightweight, but tends to deform after 3–4 years.
5. Screen design considerations: High windows and narrow widths can make screen use inconvenient. For example, if the pull is too high, it requires more effort, and wind can blow out the gauze. Magnetic strips may also fail to rewind automatically.
Suggestion: If your window height exceeds 1.4 meters, request a side-pull design. It reduces effort, prevents malfunctions, and extends the screen’s lifespan by reducing stress on the components.
6. Screen door design: Since the lower track is often stepped on, ensure the profile includes anti-tread protection.
Suggestion: For screen doors wider than 1.2 meters, install two doors. One-side pulling can cause uneven rewinding.
7. Color consistency: In Beijing, where window colors are varied, check for fading or peeling after purchase. Reputable manufacturers use electrostatic powder coating, which is baked and shaped, ensuring durability and matching with other window finishes.
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Yangzhou Mifen Import and Export Co., Ltd , https://www.fanmitrkwc.com